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Error with code to implement sound

Hi,

I'm trying to implement sound into my program. I want it so when a button is clicked the sound will play however i seem to be getting an unusual error when i'm importing sound utilities and the same error appears when i'm writing the code to do with the sound.

The error that appears for each is:
"Access restriction: The type AudioData is not accessible due to restriction on required library C:\Program Files\Java\jre7\lib\rt.jar"
"Access restriction: The type AudioPlayer is not accessible due to restriction on required library C:\Program Files\Java\jre7\lib\rt.jar"
"Access restriction: The type AudioStream is not accessible due to restriction on required library C:\Program Files\Java\jre7\lib\rt.jar"

Hope somebody as an idea as to what it could mean and i how i could resolve this.